Overedge-machine.



No. 833,075. PATENTED OCT. 9, 1906. K. MAIER.

OVEREDGE MAGHINE. APPLIGATIQN FILED MAR.9, 1906.

-UNITED STATES PATENT orFIoE. I

KARL MAIER, OF STUTTGART, GERMANY, ASSIGNOR TO UNION SPECIAL MASOHINENFABRIK, OF STUTTGART, GERMANY, A CORPORATION.

OVEREDGE-MAQHINE- Specification of Letters Patent.

Patented a. 9, 1906.

Original application filed January 18, 1905, Serial No. 241,697. Divided and this application filed March 9,1906. Serial No. 305,168.

To all whom it may concern:

Be it known that I, KARL MAIER, a subject of the German Emperor, residing at Stuttgart, in the Kingdom of Wiirtemberg, Empire of Germany, have invented certain new and useful Improvements in Overedge- Machines, of which the following is a description, reference being had to the accompany-' ing drawings, and to the letters of reference marked thereon.

This application is a division of my application, Serial No. 241,697, filed January 18, 1905.

My invention relates to overseaming-machines of the type wherein the ne edleloop is passed through the material adjacent the edge thereof, and a looper passes its loop of thread through the needle-loop, which in turn is caught by the spreader and carried over the edge of the material to be locked by the nextsucceedingneedle-loop.

My invention consists in novel mechanism for supporting and operating the looper whereby the same is caused to move forward and backward through the needle-loop and also laterally with the feed of the material, thus avoiding the pulling off of an unneces sarily large amount of needle-thread.

My invention consists, further, in details of arrangement set forth in the description and defined in the claims.

In the drawings, Figure 1 is a front elevation showing a machine embodying my looper mechanism with the spreader and its operating mechanism omitted. This figure shows a fragment of the spreader and in dotted lines the looper and spreader in different positions. Fig. 2 is a front end view of a portion of the machine, showing in dotted lines the looper in different position. Fig. 3 is a detail of the cam mechanism for moving the looper laterally.

The needle d is supported in the frame a and operated by the lever c in the usual manner. The looper f is carried by the support g, which is pivotally connected to a bearing 15, secured to a shaft h, mounted in suitable bearings on the base I) of the machine. Pivotally connected to the lower end of the support 9 is a link i, connected in turn to a bell crank lever is, pivoted on the frame a and connected by a link I to an eccentric m on the main shaft n. As the shaft rotates the looper is oscillated to enter the needle-loop and shed the same. The shaft h has connected thereto a yoke 9", which engages an eccentric s on the main shaft n, so that the looper is given a bodily lateral movement at certain predetermined times.

The feeding mechanism of my machine is the ordinary four-motion feed and, as shown in Fig. 2, includes a feed-dog 0, which engages the material operated upon to move the same. This feed-dog 0 is supported by the usual feed-bar, pivoted at its rear end to the usual supporting-frame 0, which is oscillated to move the feed-bar and the feed-clog forward and backward, giving thereto its feeding movement. The feed-dog is given its rising-and-falling movement to engage the material by an eccentric g, on which the feedbar rests. The arm p engages the eccentric on the lower side in the usual manner in this type of feed. The eccentric q, as viewed in Fig. 2, is moved in a counter-clockwise direction and operates to lift the feed-dog into engagement with the material prior to the back the eccentric q, and from the relation of these parts and the fork 1" it will be seen that while the eccentric g is operating to move the feed-dog into and holding the same in engagement with the fabric and the ordinary feeding movement is being given to the feeddog the eccentric s is turning the fork r and oscillating the looperf laterally in the direction of the feed. The looper is thus given a movement in the direction of the feed of the material, and the timing is such as to move the looper with the material.

The operation of my machine is as follows: The needle penetrates the material, rises to throw out its loop. Then the looper is oscillated by the eccentric m and its connected mechanism to enter said needle-loop. The looper-thread loop is in turn caught by the spreader c and carried over the bed-plate and positioned for the needle to enter. After the needle leaves the material the feed takes place to position the same for the next stitch. In the ordinary overedging machine the looper moves back and forth in a single plane, and consequently when the feed takes place, the needle-thread being held by a looper,

a quantity of needle-thread is necessarily pulled through the material. In my improved mechanism the eccentric s 0 erates to oscillate the shaft h as the feed talfes place, thus moving the looper with the material, and consequently no thread is pulled off by the feed movement of the material. The looper assumes its normal position before entering the needle-loop.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In an overedgin -machine, the combination of feeding mec anism and overedgestitching mechanism, including a needle, means for operating the same, a looper with means for reciprocating the same to engage the needle-loop, and means for vibrating said looper laterally in timing with the feed; substantially as described.

2. In an overedgin -machine, the combination of feeding mechanism and overedgestitching mechanism, including a needle, means for operating the same, a looper with means for reciprocating the same to engage the needle-loop, and means for vibrating said looper laterally in timing with the feed, and a spreader cooperating with said needle and looper substantially as described.

3. In an overedging-machine, the combination of feeding mechanism and overedgestitching mechanism, including a needle, means for operating the same, a thread-carrying looper, with means for reciprocating the same to engage the needle-loop, means for vibrating said looper laterally in timing With the feed, and a spreader operating to carry the looper-thread loop into position to be engaged by the needle; substantially as described.

4. In an overedging-machine, the combination of feeding mechanism and overedgestitching mechanism cooperating therewith, including a needle, means for operating the oscillating said loop, means for oscillating said support in timing with the feed, and a spreader cooperating with said needle and looper substantially as described.

6. In any overedging-machine, the combination of the main shaft extending longitudinally of the machine, a feeding mechanism, a needle, means for operating said needle, a looper, a shaft parallel to the main shaft and pivotally supporting said looper, means for oscillating said looper, and means for oscillating said looper-supporting shaft from said main shaft and in timing with the feed; substantially as described.

7. In an overedgingmachine, the combination of the main shaft extending longitudinally of the machine, a feeding mechanism, a needle, means for operating said needle, a thread-carrying looper, a shaft parallel to the main shaft and pivotally supporting said looper, means for oscillating said looper, means for oscillating said loopersupporting shaft from said main shaft and in timing with the feed, and a spreader cooperating with said needle and looper; substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

KARL MAIER.

Witnesses EMIL SCHMIDT, ERNST ENTERMANN. 

